Simulation of gravity wave effects under solstice conditions using a 3-D circulation model of the middle atmosphere

Details Simulation of gravity wave effects under solstice conditions using a 3-D circulation model of the middle atmosphere Simulation of gravity wave effects under solstice conditions using a 3-D circulation model of the middle atmosphere

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jatp...48.1203j&link_type=abstract

(International Association of Geomagnetism and Aeronomy, Scientific Assembly on Dynamics and Remote Sensing of the Middle Atmosp

Physics

17

Atmospheric Circulation, Atmospheric Models, Gravitational Effects, Gravity Waves, Middle Atmosphere, Solstices, Three Dimensional Models, Annual Variations, Atmospheric Temperature, Energy Transfer, Solar Terrestrial Interactions, Three Dimensional Flow, Vertical Air Currents

Scientific paper

Vertically propagating gravity waves can transport momentum and energy from the troposphere up to the mesosphere and thus modify the circulation of the middle atmosphere. The effects of regional gravity wave sources, together with temporal changes of gravity wave activity, are studied under solstice conditions in a three-dimensional circulation model using a simplified parameterization scheme for the gravity momentum deposition. In this way the reversal of the mean zonal wind with height and very low temperatures at the summer mesopause region can be reproduced. Using a stochastic forcing by taking the gravity wave parameters at random, characteristic oscillations are found with periods in the planetary scale range (2, 4, and 5 days) and in the tidal range (1 day, 16 h, and 12 h).

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